How to use the @ts-common/commonmark-to-markdown.iterate function in @ts-common/commonmark-to-markdown

const main = async (specificationsDirectory: string, profilesDirectory: string) => {
  try {
    const list = fs.recursiveReaddir(specificationsDirectory);
    const specs = [];  
    let foundMultiApiReadmes = false;
    for await (const file of list) {
      const f = Path.parse(file);
      if (f.base === "readme.enable-multi-api.md") {
        foundMultiApiReadmes = true;
        const content = (await fs.readFile(file)).toString();
        const readMe = cm.parse(content);
        const set = new Set();
        for (const c of cm.iterate(readMe.markDown)) {
          if (
            c.type === "code_block" &&
            c.info !== null &&
            c.info.startsWith("yaml") &&
            c.literal !== null
          ) {
            const y = (yaml.load(c.literal) as Code)["input-file"];
            if (typeof y === "string") {
              set.add(y.replace('$(this-folder)', ''));
            } else if (it.isArray(y)) {
              for (const i of y) {
                let cleanFilePath = i.replace('$(this-folder)', '');
                set.add(cleanFilePath);
                specs.push(Path.join(f.dir, cleanFilePath));
              }
            }

const main = async (dir: string) => {
  try {
    const list = fs.recursiveReaddir(dir)
    for await (const file of list) {
      const f = path.parse(file)
      if (f.base === "readme.md") {
        console.log(`processing ${file}`)
        const content = (await fs.readFile(file)).toString()
        const readMe = cm.parse(content)
        const set = new Set()
        for (const c of cm.iterate(readMe.markDown)) {
          if (
            c.type === "code_block" &&
            c.info !== null &&
            c.info.startsWith("yaml") &&
            c.literal !== null
          ) {
            const y = (yaml.load(c.literal) as Code)["input-file"]
            if (typeof y === "string") {
              set.add(y)
            } else if (it.isArray(y)) {
              for (const i of y) {
                set.add(i)
              }
            }
          }
        }